Improvement in hydrostatic balances



"1.0. BAUDISSIN.

Hydrostatic Balance. N5. 42,722. Patented May 10, 1864.

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UNITED STATES PATENT OFFICE.

JULIUS O. BAUDISSIN, 01: ST. LOUIS, MISSOURI, ASSIGNOR TO HIMSELF AND S. VANGRAAFEILAND, OF SAME PLACE.

IMPROVEMENT IN HYDROSTATIC BALANCES.

Specification forming part of Letters Patent No. 42,722, dated May 10, 1864.

To all whom, it may concern.-

Be it known that I, JULIUs'O. BAUDISSIN, of St. Louis, in the county of St. Louis, in the State of Missouri, have invented a new. and Improved Mode of Constructing Hydrostatic Scales; and I do hereby declare that the following is afull and exact description thereof, reference being had to the accompanying drawing, and to the letters of reference marked thereon.

The nature of my invention consists in the production of scales based upon hydrostatic principles, by the construction of a platform, E, or any other weighing-surface, acting upon a liquid contained in a box, A, which box A is connected by a pipe, 0, with a perpendicular glass pipe or indicator, D, provided with an index, F.

To enable others skilled in the art to make and use my invention, I will proceed to describe its construction and operation.

I construct a square box, A, whose size is immaterial, and which is closed by a platform, E. This platform E is provided in the center of its bottom with a plate, B, and near the end with other plates, b I). The platform E is connected with and closes the upper part of the box A hermetically by means of pieces of gutta-percha cloth, which are fastened to the plate I), as well as on the box A, by square pieces d and d, air-tight. In the center plate, B, a guide-rod, H, is fastened, running down in aperpendicular direction. This guide-rod H is provided at the place where itleaves the box A with a groove, 6, where it is connected with and closes the box A air-tight, by guttapercha cloth, fastened to the guide-rod H in groove e, as well as to the bottom of the box, by rings, which latter are marked f f. The guide rod H, after entering the frame I, is provided at the upper end as well as at the lower end of the frame I with four balancingrods, 9 and g, at each place pointed on both ends of the rods, and is obliged by these balancing-rods to move always in a perpendicular direction. YVithout these guiding and balancing rods the platform E, when any weight is acting upon it, would press under different angles upon the liquid in the box A, according to the position of the weight upon the platform E, and would produce an irreguforced to rise in the indicator.

and this glass pipe or indicator D is provided with an index, F, which shows the weight acting on theplatform E. To the pipe C an elbow,

h, is attached, which is provided at its upper end with a screw, q. By means of the elbow h, the box A is filled with the liquid, and to allow the air contained in the box A to escape the platform has a little screw, m. In filling care is to be taken that all the air is replaced in box A by the liquid used, as the least presence of air would preventthe correct weighing, on account of its elasticity. At the upper end of the indicator I attach a gutta-peroha bag, G, which will expand when the liquid is Instead of a bag, a globe might be attached to the indicator, and then, in weighing, the air would be pressed more or less into the globe, according to the amount of the weight. The index would then haveto be constructed accordingly, and this arrangement would allow to weigh even great weights with a small indicator.

To prevent the action of any common temperature upon my scales and their liquid, I use, commonly, water mixed with alcohol, or pure alcohol; but there are otherliquids that might be used with the same effect. I fill my box A at a temperature of about 60 Fahrenheit. When the scales are resting, the liquid in the indicator has to stand even with 0 on the index, and any irregularity can easily be adjusted by the screw (1 of the elbow h.

The moment when the liquid in the indicator D balances the same in the box Athe action of any temperature and any irregularity that might be produced by the same will not be visible in the indicator, as the quantity of liquid used is small and any expansion will raise the platform, but will not be visible in the indicator.

The principal advantages of scales are the following, viz:

These scales do not require any weightstones, but are self acting.

The object to be weighed may be put on y hydrostatic rod B by metallic or other rings, -f--e, and square pieces 01 d, as set forth. 7

2. The guide-rod B and balancingrods g g, as set forth.

3. The regulating-screws q and :10, as setforth.

4. The guttapereha bag G on top of the in-..

dica-tor, as set forth, all in the manner and for the purpose as specified above.

JULIUS O. BAUDISSIN.

Witnesses:

O. 0. HARTMAN, WM. BROWN. 

